5 Things You Never Knew About Sun Protection

Think slathering on sunscreen is enough? Think again

Fact: You don't need sun exposure to get Vitamin D. We hear the vitamin D excuse all of the time. A good friend insists she doesn't need SPF for our 45-minute runs because she's "getting her vitamin D for the day." Dr. Graf's advice: take a supplement.

"Vitamin D is a hormone, and it's important," says Graf. "But you can get it through food or take it as a supplement. And get tested to see if you're vitamin D deficient before you take action."